<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="../bootstrap/css/bootstrap.css">
</head>
<body>

<a href="#" class="btn btn-primary" role="button" data-toggle="button">Toggle link</a>
<a href="#" class="btn btn-primary active" role="button" data-toggle="button"
   aria-pressed="true">Active toggle link</a>
<a href="#" class="btn btn-primary disabled" tabindex="-1" aria-disabled="true" role="button"
   data-toggle="button">Disabled toggle link</a>

<script src="../bootstrap/js/bootstrap.js"></script>
</body>
</html>